Abstract:
The present invention relates to data transmission/reception methods using a polar coding scheme, and devices for supporting same. The method for transmitting data by using polar coding in a wireless access system, according to one embodiment of the present invention, may comprise the steps of deriving Bhattacharyya parameters according to data bits input for finding noise-free channels among equivalent channels; allocating data payloads comprising data bits and cyclic redundancy check (CRC) bits to the found noise-free channels; inputting the data payloads into a polar encoder; and transmitting code bits output by the polar encoder, wherein the CRC bits may be allocated to better noise-free channels, among the noise-free channels indicated by the Bhattacharyya parameters, than the data bits.
Abstract:
Disclosed are a method and an apparatus for transmitting and receiving data. A method for transmitting an uplink comprises the steps of: a terminal receiving first downlink data from a first cell through a first subframe; the terminal receiving second downlink data from a second cell through the first subframe; the terminal transmitting first uplink data, which is generated based on a first identifier of the first cell, as a reply to the first downlink data through a second subframe, and the terminal transmitting second uplink data, which is generated based on a second identifier of a second cell, as a reply to the second downlink data through the second subframe.
Abstract:
The present invention relates to various methods for performing quasi co-location (QCL) and apparatuses supporting the same. As an embodiment of the present invention, a method for performing quasi co-location (QCL) for a new carrier type (NCT) by a terminal in a wireless access system may include the steps of: receiving a higher layer signal including a QCL reference CRS information parameter indicating CRS information of a reference carrier; receiving a physical downlink control channel (PDCCH) signal including a PDSCH remapping and quasi co-location indicator (PQI) field; receiving a CSI-RS of a QCLed NCT and a CRS of a reference carrier on the basis of a PQI field and a QCL reference CRS information parameter; and performing frequency tracking of the NCT and the reference carrier on the basis of the CSI-RS of the NCT and the CRS of the reference carrier.
Abstract:
A method for and apparatus for supporting a carrier aggregation group in a wireless communication system supporting multiple carriers is provided. A wireless device receives a RRC configuration signal including one or more serving cells from a macro cell and a RRC configuration signal including one or more serving cells from a small cell, and configures at least two carrier aggregation group (CAG)s based on the RRC configuration signal each. And, this invention includes that cell planning for multi-CCs is provided more accurately and efficiently.
Abstract:
The present invention provides methods for transmitting an SRS in a wireless access system supporting machine type communication and apparatuses for supporting the same. A method for transmitting a sounding reference signal (SRS) by a terminal in a wireless access system supporting machine type communication (MTC) according to an embodiment of the present invention may comprise the steps of: receiving an SRS transmission parameter configured for repeated transmission of an SRS from a base station; and repeatedly transmitting an SRS during a predetermined SRS repeated transmission interval according to the SRS transmission parameter.
Abstract:
Provided is a method for determining an uplink transmission timing of a terminal having a plurality of cells configured therein, and a terminal using the method in a wireless communication system. The method comprises receiving timing advance (TA) configuration information, and determining an uplink transmission timing for each of the two cells on the basis of the TA configuration information, wherein the plurality of cells comprise a first cell using a frequency division duplex (FDD) frame structure and a second cell using a time division duplex (TDD) frame structure.
Abstract:
In this application, a method for a terminal reporting to a base station a channel quality indicator (CQI) in a wireless communication system is disclosed. More specifically, the method comprises the steps of: calculating a precoding matrix index and a rank indicator; and selecting and reporting the CQI index from one of a first CQI index table and a second CQI index table under the assumption that the precoding matrix index and the rank indicator are applied, wherein the first CQI index table and the second CQI index table indicate a modulation order and a coding rate indicated by the CQI index, and the second CQI index table supports a higher modulation order than the first CQI index table.
Abstract:
There are provided a method of carrying out synchronization tracking and a wireless device using the same. The wireless device receives CSI-RS (Channel Status Information-Reference Signal) setting for prescribing the CSI-RS from a base station, and TRS (Tracking Reference Signal) setting for prescribing the TRS from the base station. The wireless device tracks the synchronization based on the TRS.
Abstract:
Provided is a method for receiving downlink data in a wireless communication system. User equipment (UE) receives downlink control information in a first subframe from a primary cell. The user equipment receives downlink data from a secondary cell in a second subframe over a physical downlink shared channel (PDSCH). The user equipment determines a transmission block size in accordance with the type of the carrier of the second subframe. The user equipment decodes the PDSCH on the basis of the downlink control information and the transmission block size.
Abstract:
The present invention relates to methods for performing a radio resource measurement in a synchronized cell when a similar co-location is applied and apparatuses for supporting the same. As an embodiment of the present invention, a method in which a user equipment (UE) performs a radio resource measurement (RRM) in a radio access system may comprise the steps of: receiving a higher layer signal including similar co-location (QCL) information of a channel state information reference signal (CSI-RS) of a first cell and a cell specific reference signal (CRS) and/or a CSI-RS of a second cell; receiving the CRS and/or the CSI-RS of the second cell on the basis of the QCL information; and measuring a first RRM of the first cell by using the CRS and/or the CSI-RS of the second cell.